Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The advent of September brings a slight shift in average high-temperature, moving from 81.5°F (27.5°C) in August to a still warm 75.2°F (24°C). An average temperature of 55°F (12.8°C) is recorded during the nights in September.Humidity
In West Lafayette, the average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall in West Lafayette, Ohio. Rain falls for 10.8 days and accumulates 0.98" (25mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 27min.On the first day of September in West Lafayette, sunrise is at 6:55 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:10 pm EDT.
Sunshine
In September, the average sunshine in West Lafayette is 8.4h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. It's recommended to limit sun exposure when its radiation is at its peak during midday. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in West Lafayette?
What is the average humidity in September in West Lafayette?
What is the driest month in West Lafayette?
How many days does it rain in September in West Lafayette?
When it does not snow in West Lafayette?
What is the average length of the day in September in West Lafayette?
When is the sunrise / sunset in September in West Lafayette?
How many hours of sunshine does West Lafayette have in September?
What is the UV index reading in September in West Lafayette?
Average temperature in September
West Lafayette, OH
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in September: 55°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in September
West Lafayette, OH
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
West Lafayette, OH
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in September
West Lafayette, OH
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are April and November (77%).
Average rainfall in September
West Lafayette, OH
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is May (2.01").
The driest month (with the least rainfall) is September (0.98").
Average rainfall days in September
West Lafayette, OH
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is May (16.4 days).
The months with the least rainy days are February and November (7.7 days).
Average snowfall in September
West Lafayette, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.32").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
West Lafayette, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
West Lafayette, OH
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
West Lafayette, OH
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (11 days).
Average UV index in September
West Lafayette, OH
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
West Lafayette, OH
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
West Lafayette, OH
- Average visibility in September: 5mi
The months with the highest visibility are March, April, October and November (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and December (5mi).
West Lafayette, Ohio, USA
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